Numbers 6:18-19

18Then the Nazirite must stand at the place where people go into the Tent of Meeting. He must remove all the hair from his head. He must put his hair into the same fire where the priest has cooked the friendship offering.

19When the male sheep is cooked, the priest must take its shoulder. Also, he must take one cake and one thin biscuit from the basket. The cake and the biscuit must not have yeast in them. The priest must put these things into the hands of the Nazirite who has removed the hair from his head.